PAPR reduction using SLM technique combined with ABO-OFDM for optical wireless communication

Srishti Saxena; Bipin Kumar Saw; Kamal Kishor Choure; Manisha Prajapat; Santosh Kumar; Ghanshyam Singh

doi:10.1117/12.2687559

26 November 2023 PAPR reduction using SLM technique combined with ABO-OFDM for optical wireless communication

Srishti Saxena, Bipin Kumar Saw, Kamal Kishor Choure, Manisha Prajapat, Santosh Kumar, Ghanshyam Singh

Proceedings Volume 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X; 127760K (2023) https://doi.org/10.1117/12.2687559
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Optical Wireless Communication (OWC) has the potential to offer a transmission link that is both dynamic and flexible in comparison to fiber optics communication. The optical spectrum exhibits a significantly greater range than the conventional Radio Frequency (RF) communication spectrum. Optical Orthogonal Frequency Division Multiplexing (OOFDM) can be treated as an integral part of OWC Systems. It is a modulation technique which refers to the implementation of OFDM in the Optical Domain. For the OFDM signal to be transmitted in the Optical domain, we perform Intensity Modulation/Direct Detection and for that the signal needs to be real and positive. In this paper, we have made the signal Hermitian symmetric along with IFFT and performed adaptive biasing to make the transmitting signal real and positive respectively. One of the major issues which still persists is the high Peak-to-Average Power Ratio (PAPR). To overcome this, we have implemented Selected Mapping (SLM), using Shapiro-Rudin Phase Sequences (SRPS). We have used SRPS as they yield a low crest factor, have good randomness, strong correlation, and help in reducing the average transmit power, which will eventually help in decreasing the complexity of the system. By performing Adaptively Biased Optical OFDM (ABO-OFDM) in conjugation with SLM we have been able to achieve a reduction of about 3 dB in the PAPR graph, without affecting the BER curve. Moreover, the increase in the system complexity is comparatively lower, or it can be stated that the increase is approximately halved.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Srishti Saxena, Bipin Kumar Saw, Kamal Kishor Choure, Manisha Prajapat, Santosh Kumar, and Ghanshyam Singh "PAPR reduction using SLM technique combined with ABO-OFDM for optical wireless communication", Proc. SPIE 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X, 127760K (26 November 2023); https://doi.org/10.1117/12.2687559

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KEYWORDS

Spatial light modulators

Orthogonal frequency division multiplexing

Transmitters

Modulation

Data transmission

Signal detection

Receivers

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